| Title |
Analysis of Wind Force Coefficient Characteristics of Rooftop-Mounted Photovoltaic Panels |
| Authors |
유장열(You, Jang-Youl) ; 박민우(Park, Min-Woo) ; 유기표(You, Ki-Pyo) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.12.289 |
| Keywords |
Wind Tunnel Test; Computational Fluid Dynamics; PV Panels; Roof-mounted; Wind Force Coefficient |
| Abstract |
The increasing use of rooftop photovoltaic (PV) systems requires reliable assessment of wind loads to ensure structural safety. This study
investigates wind force coefficients of rooftop-mounted PV panels through wind tunnel tests and computational fluid dynamics (CFD). A
scaled cubic building model with a 3-row, 2-column PV array was tested under 40 wind directions at tilt angles of 15°, 30°, and 45°.
Results showed clear dependence on panel location and tilt angle. Edge panels, particularly in the third row, exhibited sharply increased
normal force coefficients under 180° wind due to concentrated separation and updrafts. Comparison with the Korean Design Standard (KDS
41 12 00:2022) revealed that windward positive pressures were highly overestimated, with design values up to four times greater than
experiments, whereas leeward suction loads were closer to or exceeded design values. CFD simulations using the SST k-ω model agreed well
with experiments (correlation >0.9), reproducing stronger underside pressures in leeward conditions. The findings emphasize that leeward
suction governs rooftop PV wind loading and support the need to refine current design standards. |